PCBs were widely used as industrial dielectric additives in transformer and capacitor coolants and insulating fluids. Due to undesirable carcinogenicity, PCB production has been banned since the 1970s. PCBs are considered chemically inert and resist environmental degradation, and as such remain environmentally persistent pollutants.

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Conifers are often used as an “air passive sampler”, but few studies have focused on the implication of broadleaf evergreens to monitor atmospheric semivolatile organic compounds such as polychlorinated biphenyls (PCBs). In this study, we used Rhododendron maximum (rhododendron) growing next to a contaminated stream to assess atmospheric PCB concentrations. The study area was located in a rural setting and approximately 2 km downstream of a former Sangamo‐Weston (S‐W) plant. Leaves from the same mature shrubs...

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